A new poll of Louisiana voters shows a tight U.S. Senate race between incumbent Democrat Mary Landrieu (above) and Republican challenger and U.S. Rep. Bill Cassidy.

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A new poll of Louisiana voters shows a tight U.S. Senate race between incumbent Democrat Mary Landrieu and Republican challenger and U.S. Rep. Bill Cassidy as well as improving approval numbers for Gov. Bobby Jindal.

Landrieu led Cassidy 44 percent to 40 percent with 14 percent undecided in the poll, which was commissioned by Jindal's campaign.

The poll of 800 Louisiana voters, conducted by OnMessage, shows Jindal with a 50 percent approval rating and that a majority of state voters approve of Jindal's decision to reject a Medicaid expansion associated with the Affordable Healthcare Act. ...